Improvement in mechanical movements



L. V. LEWIS.

Mechanical Movements.

N0. 141,800. Patented August12, 1873.

WITNESSES. v INVENTEIR %/9M AM. PHOT01I7H06RAPHIL no my (osaomvs mums) uNITED STATES LEDYARD V. LEWIS, OF SUN PRAIRIE, WISCONSIN.

IMPROVEMENT IN MECHANICAL MOVEMENTS.

Specification forming part of Letters Patent No. 141,800, dated August12, 1873; application filed July 18, 1873.

To all whom it may concern.-

Be it known that I, LEDYARD V. Lnwrs, of Sun Prairie, county of Dane andState of lViscon sin, have invented certain new and useful Improvementsin Mechanical Movements, of which the following is a specification:

The nature of my invention relates to an improvement in mechanicalmovements for converting rotary into reciprocating motion; and itconsists in a double-cranked axle connected by two connecting-rods todouble toggle-jointed levers, one end of the levers being stationary,while the other is attached to a slide, to which the pitman is secured.By revolving the axle the levers are made to open and close, and thuscause the pitman to reciprocate back and forth.

The accompanying drawings represent my invention.

a represents the frame, of any suitable construction, in which isjournaled a doublecranked axle, 1, to be operated by belt, crank, orlever power, as may be desired. To each crank is attached a connectingrod, 2, the outer ends of which are secured to the double togglejointedlevers 3 at the joints 4. The lower ends of these levers are pivoted tothe frame a, so that they will remain stationary, while the upper onesare attached to the slide 5, to which the pitman 6 is secured.

Upon causing the axle to revolve, the connecting-rods draw the levers 3in and out so as to open and close, giving-a reciprocating motion totheir upper end, which is imparted through the slide to the pitman.

Where this device is employed to transmit.

motion in both directions, a pitman will be secured to each end of theslide so as to make it double-acting, the slide having a slot, 7, cutthrough it, so that it will pass over the axle.

This movement is applicable to jig-saws, mortising machines,locomotives, power pitmen, punches, and many other uses.

Having thus described my invention, I claim- 1. The combination of thedouble-cranked axle, connecting-rods, toggle-levers, and slide, whencombined substantially as set forth.

2. A mechanical movement in which the parts are combined and arranged tooperate substantially as shown and described.

In testimony that I claim the foregoing as my invention I hereunto aflixmy signature this 14th day of July, 1873.

L. V. LEWIS.

Witnesses:

GEORGE W. BULL, CHARLES S. Onossn.

